<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        p:before{
            content: url("https://ss0.baidu.com/73t1bjeh1BF3odCf/it/u=2688306089,285045907&fm=85&s=07F07F854233062E0EB154160300F0C2");
        }
    </style>
    <!--引用外部样式-->
    <link rel="stylesheet" href="my.css">
    <link rel="stylesheet" href="http://at.alicdn.com/t/font_544187_556fkna1ddtsatt9.css">
</head>
<body>
<p class="my">哈哈哈哈</p>
<i class="iconfont icon-30"></i>
</body>
</html>